Traction-engine.



J. B. BARTHOLOMEW. TRACTION ENGINE.

APPLICATION FILED AUG. 7, 1907. RENEWED MA Patented Nov. 10, 1914. 3 SHEETS-SHEET 1.

J. B. BARTHOLOMEW. TRACTION ENGINE.

AIPLIGATION FILED AUG. 7, 1907. RENEWED MAR. 9, 1914- gmmuuu mu Ill! Patented Nov. 10, 1914;

3 SHEETS-$311M! 2.

J. B. BARTHOLOMEW. TRACTION ENGINE.

APPLICATION 111-1311 11mm. 1907. RENEWED MAR. 9. 1914.

1 1.16 785. Patented Nov. 10, 1914. V a SHEETS-$111113! a.

\Illllllll H H THE NORRIS PETERS C01, PHOTOVLITHOH W SHING N D. C

of the main frame.

may be taken into places and over ground I the use of all of the the boiler for steering.

ToAvERYcoMrANxiA CORPORATIONOF ILLINoIs,

TRACTION-ENGINE.

Application filed August 7, 1907,

To aZZw/zomc'tmay concern,"

c it known that I, JoHn B. BAR- new and useful Improvements in Traction- Engines, of which the following. is a specification, reference being had therein to the accompanying drawing. I g

his invention relates to improvements in traction engines; more particularlyto engines of the class in which the cylinders, pistons, and the shafting and gearing areall placed below the boiler. Heretofore, engines of this sort have been constructed with heavy, cumbersome and expensive frame structures situated in relatively low horizon tal planes, these extending from end to end and having combined with them extension rames projecting forward beyond the front end ofthe boiler and beyond the front end As is well known, "it is very desirable to have these traction en- I gines as light as possible, without sacrificingstrength' or rigidity, in order that they which cannot be traveled over when they are h y i 1 Thepurpose of the present invention is to, provide a strongengine structure without; employing the heavy beam frames that have been heretofore used and whichwill permit necessary engine parts, shafting-and gearing, without requiring that they should be attached to the boile'r,'a nd a1 so arranged that I he invention relates to other matters which will be readily gunderstood' from the description below, taken in "connectionwith v the drawing. i Figure l is a side view of a traction engine embodvingmy improvements; Fig. 2 isa top plan view of the parts remaining after the boiler, the fire-box and thecab have been tion on the line a-a of'Figs. l g 4 is a vertical transverse section onthe line b-b, Figs. 1 and ig. 5 is a perspective Y of the front bracket connected to the front wheels. I supporting bracket.

Fig. 6 is a perspective of the engine- Fig. 7 is a perspective of the bracket at the center of the boiler;

Specification of Letters Patent.

Serial No. 387,539. Renewed March 9, 1s1-4.- Serial No.

Patented Nov. 10, 1914;

traction engine are indicated more' or less conventionally, and with respect to these it will be understood that the constructor can employ one form or anotheras he prefers; indicates, generally, the boiler' proper;

the cab;

(cc D the rear ground wheels; E the front wheels; F the engines proper; and G the crank shaft. I

A H, I there is intermediate shafting gearing which may including m be of I the forward They provided with gitudinally so I proper bracing of the boiler and theframe with "relation toeach other. 4

indicates, as an entirety, extends downward from the any preferredsort nieansfor changing speed and is mounted uponthe J I front-end thereof in bearings at g. ,1}

indicate stay rods or supporting rdds I i brackets'at 70 secured I a bracket which boiler at points nearerfits front end. It is formed with a erally the legs Z". lVith these there-is formed a shelf-like plate'Z which is braced to the upper partof thebracket by the web Z The cylinders .of :the. engines at F rest upon'thebracket plate 1?; -The engine cyle various minor parts oft-the engine,

rproper,yneed not'be here describediu detail. In the drawings many of the parts of a T ey are shown 5 and describedxin, Patents I to.

] From this there extend downwardand lat v inders are cast with the rearwardextending 1'00 i the arm is pivoted, the arm being forked or c wheel 8 at the ed on the Nos. 8%,589 and 842,8d0, to William N. Springer, dated January 29,1907, and reference can be made thereto for a full understanding of the devices for governing the engine, and the means for transmitting ower from the crank shaft to the ground wheels, the means for changing the speed, the ducts for the live steam and for the exhaust, the valve gear,-&c. The front wheels are in this construction supported directly from the forwardly extending part A of the boiler shell.

0 is a bracket secured to the sides of the boiler and extending downward therefrom to support the axle and the carrier for the front wheels.

are brace rods rigidly secured to the bottom part 0 of this bracket and extending backward-and upward and bolted to the saddle part Z of the bracket standard L The axle of the front wheels E is secured to a yoke P having a stem or arm p which extends back to and beyond a nut Q to which so made as to lie partly above and'partly below the nut. The nut engages with a threaded shaft B which ismounted in the lower ends of the legs Z of the bracket standard L in the bearings 1".

S is the steering shaft running from the engineers platform down to the bevel gear at T which drives spur gearing U, one

threaded. shaft R. The arm p is as shownat extended behind the screwshaft R and its rear end passes through a keeper or guideat p i The details of thedevices for mounting and steering the front wheels E and their axle are also preferably similar to those shown in the aforesaid Patents, Nos. 842,589 and 842,8 l0,to W. N. Springer,though there can be modification in respect to these as desired.

The engines as willbe seen areso arranged that the strains exerted by them are The webs or arms to the cross transferred tothe short rear. frame J, the bracket L serving merely as a vertical carrier for the cylinder ends of the engines. M being firmly connected bars of the main frame serve to transmit the longitudinal strains thereto.

A great partof the weight incident to the heavy wrought beam frame of undermounted engines as heretofore constructed is dispensed with without sacrificing any of the necessary strength or rigidity of the structure. Moreover, as the side bars of the frame are dispensed with along the front art of the engine ample room is leftdirectly 'below the boiler in which wheels E can be turned sharply so that an engine having its parts constructed and related as above shown, can be steered with very short turns. The. engines, proper,

of the spur wheels being mount-.

pendent of the aforesaid the steering being in horizontal planes considerably be low the boiler, there is ample space above wherein can-be placed the governor mechanismindicated as an entirety The bracket N serves to combine together the rearends of the engine frames and to brace them properly in relation to the boiler as well as to support some of the moving parts of the mechanism such as the governcr gear.

What I claim is:

1. In a traction engine, of the boiler, the rear driving wheels and axle therefor, the main frame below the boiler and supported by the said axle, the crank shaft mounted on the front end of said main frame, the gearing and shafting interposed between the crank shaft and the drive wheels, the engine frames extending forward from the crank shaft and mounted at their rear ends on the said main frame, the downward extending bracket secured to the bottom of the boiler and vertically supporting the front endsof the engine frames independently of the main frame, the front ground wheels and means for supporting the front end of the engine on the said front ground wheels independently of the aforesaid main frame, substantially as set forth.

2. In atraction engine, the combination of the boiler, the drive wheels, the main frame below the boiler connected to the drive wheels, the crank shaft mounted on the forward end of said main frame, the shafting and gearing interposed between the crank shaft and the ground wheels and supported on the said main frame, the engine frames below the boiler, the bracket indeframe for vertically sustaining thecylinder ends of the engine frames, the bracket independent of the said frame for vertically sustaining the shaft ends of the engine frames, the front supporting wheels for the engine, and steering devices for the said wheels supported on one of the aforesaid brackets, substantially as set forth... V

V 3. In .a traction engine, the combination of the boiler, the drive wheels, the crank shaft mounted on-the forward end of the main frame, the shafting and gearing interposed between the crank shaft and the ground wheels and supported on the main frame, the engine frames below the boiler, the bracket independent of the aforesaid main frame for vertically sustaining the cylinder ends of the engine frames, the bracket independent of the aforesaid main frame for vertically sustaining'the shaft ends of the engine frames, the front ground wheels, and means for supporting the front end of the engine on the said front ground wheels independently of the aforesaid main frame, substantially as set forth.

4;. In-a traction engine,

byW

the combination the combinatio i a of the boiler, the front dirigible wheels diof the boiler, the driving wheels and axle therefor, the main frame below the boiler and supported by said axle, the crank shaft mounted on the front end of said main frame, the gearing and shafting interposed the front wheels, the gearing and shafting between the engines and the traction Wheels, andthe rigid longitudinal tension and compression connections supplemental to the boiler between the rear wheels and the en-e,

between the crank shaft and the drive gines. Wheels, the engine frames extending for- 6. In a tractionengine, the combination Ward from the crank of the horizontal longitudinal boiler, the rear traction wheels supporting the rear end of the boiler, the front dirigible Wheels directly supporting the front end of the boiler,

ownward extending bracket secured'to the bottom of the boiler and vertically supporting the front ends of the engine frames independently of the main frame, the front ground wheels, means for supporting the front end of the engine on the said front ground Wheels independently of the aforesaid main frame, and steering devices for the said front wheels supported on the aforesaid bracket.

5. In a traction engine, the combination of th t e rigid longitudinal tension and compression connections supplemental to the boiler between the rear wheels andthe engine.

In testimony whereof I aflix my signature, in presence of two witnesses.

JOHN B. BARTHOLOMEW.

rectly supporting the front end of the boiler, Witnesses: the engines supported at their front ends G. W. PERRY, Jr., directly from the boiler independently off A, L REGORY.

M Copies 01 this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. G." i 

